Physics Past Questions 2023

Sample WAEC-style Practice Questions (Original Content)

WAEC Style

Question 1

Which of the following instruments is most suitable for measuring the diameter of a very thin wire?

Question 2

The relative density of a substance is the ratio of its density to the density of:

Question 3

A body starts from rest and moves with a uniform acceleration of 2 m per second squared. Calculate its velocity after 10 seconds.

Question 4

The tendency of a body to remain at rest or continue in its state of uniform motion in a straight line is called:

Question 5

Which of the following is true about the mass and weight of an object on the Moon compared to the Earth?

Question 6

The friction within a fluid (liquid or gas) that opposes the motion of one layer over another is called:

Question 7

The minimum velocity required for a body to escape the gravitational pull of a planet is called:

Question 8

A simple machine with a velocity ratio of 4 is used to lift a load of 100N using an effort of 40N. Calculate the efficiency of the machine.

Question 9

The point through which the resultant of the weights of all the particles of a body acts is the:

Question 10

Which of the following properties is characteristic of a stable equilibrium?

Question 11

Calculate the work done in lifting a 5kg mass through a vertical height of 2m. (Take g = 10 m per second squared)

Question 12

The energy stored in a stretched catapult is:

Question 13

The melting point of a substance is affected by pressure. For a substance that expands on solidifying (like ice), an increase in pressure will:

Question 14

Which of the following is the best conductor of heat?

Question 15

The rise or fall of a liquid in a narrow tube is called:

Question 16

According to the Kinetic Theory of gases, the absolute temperature of a gas is a measure of the average:

Question 17

In a bimetallic strip used in a thermostat, the two metals have different:

Question 18

A magnifying glass (simple microscope) consists of a:

Question 19

The colored pattern seen on a thin film of oil on water is due to:

Question 20

The speed of light in water is 2.25 x 10 to the power of 8 m per second. If the speed of light in vacuum is 3.0 x 10 to the power of 8 m per second, calculate the refractive index of water.

Question 21

Sound waves are described as longitudinal because the particles of the medium vibrate:

Question 22

The loudness of a sound note depends on the ______ of the sound wave.

Question 23

A string of length 0.5m is vibrated to produce its fundamental note. If the speed of the wave in the string is 200 m per second, find the frequency.

Question 24

An object is placed at the center of curvature of a concave mirror. The image formed is:

Question 25

Which of the following electromagnetic waves has the highest frequency?

Question 26

The unit of electric charge is the:

Question 27

A capacitor consists of two parallel plates separated by a/an:

Question 28

Which of the following is Ohm's Law?

Question 29

Three 6-ohm resistors are connected in parallel. What is the effective resistance?

Question 30

The core of an electromagnet is usually made of soft iron because soft iron:

Question 31

The angle between the magnetic North and the geographic North is called:

Question 32

A step-up transformer increases:

Question 33

Which of the following is a result of the particle nature of light?

Question 34

The mass number of an atom is the total number of:

Question 35

A radioactive atom emits a beta particle. The atomic number of the new atom:

Question 36

Calculate the pressure exerted by a force of 50N acting on an area of 2 square metres.

Question 37

The direction of an induced current is such that it opposes the change producing it. This is:

Question 38

Which of the following is a renewable energy source?

Question 39

The force of attraction between two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This is:

Question 40

A simple pendulum has a period of 2 seconds. What will be the period if the length of the string is quadrupled (multiplied by 4)?

Question 41

The work done per unit charge in moving a charge between two points in an electric field is the:

Question 42

An electric heater is rated 1000W, 200V. Calculate the current it draws.

Question 43

Which of the following radiations is NOT deflected by a magnetic field?

Question 44

The wavelength of a wave is 0.1m and its frequency is 20Hz. What is the period of the wave?

Question 45

In the refraction of light, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. This is:

Question 46

Which of the following is a semiconductor material?

Question 47

The specific latent heat of vaporization of water is 2,260,000 J per kg. How much heat is required to turn 0.1kg of water at 100 degrees C into steam?

Question 48

A beam of light travels from air into glass. The light beam will bend:

Question 49

The instrument used to detect presence of electric charge is the:

Question 50

Einstein's mass-energy equation is given by:

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